This will create a repository loaded from the resource "/tck/default/configRepository.xml" (which must be accessible
through the classpath) and return the JCR repository named "Test Repository Source". The name of the repository is
important as a single configuration file may contain configuration information for many JCR repositories.

This method first attempts to convert the obj parameter into a reference to JNDI configuration
information. If that is successful, a JcrEngine will be created (if not previously created by a call to this
method) and it will be configured from the resource at the location specified by the configFile key in the
reference. After the configuration is successful, the JcrEngine will be queried for
the repository with the name specified by the value of the @{code repositoryName} key in the reference.